* lengthy post *
It's just that, doing what you want to do. You feel like eating an apple, so you go and eat an apple. You want to reply to my post, so you do it.
As David Hume put it:
Now I know that upon reading this you will immediately think that I missed your entire point. Trust me, I didn't, but this just goes to show you the nature of this debate.
I can characterize hard determinism as follows:
1. The observed laws of physics govern everything in the universe.
2. Humans are physical objects that are part of the universe and as such are governed by the same laws.
3. Given a specific initial configuration of the universe, and unchanging universal laws of nature, then there is only one way the history of our universe could have unfolded.
4. Human actions are part of the history of the universe and therefore cannot be otherwise than they are given the initial configuration of the universe and the laws of nature.
First and foremost let me say that I personally accept all of the above.
The incompatibilist will go on to say:
i. Given 1-4, for a person to act differently than s/he did, s/he must be able to either:
a. Change the laws of nature
b. Change the initial configuration of the universe
c. Step outside the domain of the laws of nature
ii. All we know about the world suggests that a-c are impossible.
iii. Hence a person cannot act differently than he or she did.
iv. Therefore, there is no free will.
The compatibilism I personally believe in doesn't disagree with i-iii, only with iv.
In other words, even if we assume that the history of the universe is determined solely by the initial configuration and the laws of nature, this does not mean humans are not free in any meaningful way.
How can that be, you ask? Ask yourself why is it that the perspective of God/no one should take precedence over the perspective of humanity. We all make decisions and act according to our wishes. Throughout human history, individuals from Rosa Park to Hitler, Julius Caesar to Einstein, have all changed history. Their actions, character, motivation and planning made an impact on the world. If I can do what I want to do, then why am I not free? How is the perspective of the outsider looking on the 'block universe', as it is sometimes described, relevant for determining the nature of human freedom? Does freedom consist of being uncaused, escaping the domain of the laws of nature or being able to retroactively changed the original state of the universe?
A universe without laws, or equally, where laws can be trampled over by the whims of individuals, is a universe of randomness, where no action can have any meaning as it is only a product of brute impulse, without being grounded in some greater rationale. The notion that this is the free will we should aspire to, or regret that we lack, is eventually rooted in confusion. Yes, determinism is incompatible with
that type of free will, but it's ultimately irrelevant for human purposes.
Which brings me to morality. People often hang up on this debate because of its supposed ramifications on free will. I personally don't see it. Even in a deterministic world, punishment can deter and rehabilitation can rehabilitate. When you train a dog to perform tricks with rewards, you don't need to suppose that the dog is able to escape that causal chain of the universe in order for your training to work. Reward and punishment, praise and blame, simply are factors that factor into our decision making progress, and they make sense even if no radical free will exists. People who are assholes are assholes, and good people are good, regardless of whether they must be so from the 'block universe' perspective. It just doesn't really matter. I'll end this with a thought experiment which I think was given by philosopher Harry Frankfurt.
A person enters a build and faces two doors, marked A and B. He examines both doors, and decides to exit through door A. Unbeknownst to him, however, door B was locked all the time, so he couldn't have opened it even if he had wanted to. Does that mean he didn't actually choose to exit through door A? Does that mean he cannot be held responsible for exiting through door A? I think not.